Chilean embassies around the world are taking extra security measures after a mail bomb exploded Thursday at the country's embassy in Rome. "After something like this, we have to take precautions, particularly in Rome," Foreign Minister Alfredo Moreno told a news conference, without specifying what kind of measures will be taken. "The bomb (in Rome) was wrapped in a letter...and injured a Chilean, Cesar Mella, who works at the embassy," he said. Mella had serious injuries on both hands and risked losing sight in one of his eyes, Moreno added. He said Swiss, Ukrainian and Croatian embassies in Rome also received mail bombs on Thursday, and a Swiss embassy employee was also injured. No one has claimed responsibility and the motives are unknown. Italian police did security checks in all embassies and consulates in Rome after the incidents. The attacks on embassies followed a bomb scare in Rome's subway system on Tuesday, during which authorities discovered a suspicious package with wires and powder under a seat. The device turned out to be a fake bomb. Last month, a mail bomb was sent to the Chilean embassy in Athens, but no one was hurt.